关于举办澳大利亚昆士兰大学Kitipornchai Sritawat教授 学术讲座的通知
发布时间: 2018-01-16

目:Numerical Simulation of the Ultimate Behaviour of Transmission Tower Structures/传输塔结构承载性能的数值分析

 间:2018011910:00~11:00

 点:七号楼二楼大会议室

报告人:Kitipornchai Sritawat教授(澳大利亚昆士兰大学)

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                     土木与交通学院

                     2018年01月19日


报告人简介:

       Professor S Kitipornchai is from the School of Civil Engineering at the University of Queensland, Australia. He is a Fellow of the Australian Academy of Technological Sciences and Engineering (ATSE) and a Fellow of the European Academy of Sciences and Arts (EASA). He is the Regional Editor of Engineering Structures journal since 1993.His research interests are in the areas of structural stability, steel structures, transmission towers, computational mechanics, advanced composite and smart materials. He has published over 330 journal papers, and 8 books, with a web of science h-index of 50 and over 10,000 citations.

He has won many awards that include the Tileman Prize, the James Hardies Award, the Munro Prize, the University of Queensland Teaching Excellence Award, and the Monash Civil Engineering Alumnus of the Year Award.

报告摘要:

A nonlinear analytical technique for predicting and simulating the ultimate structural behaviour of self-supporting transmission towers under static load conditions has been developed. The method considered both the geometric and material nonlinear effects and treated the angle members in the tower as general asymmetrical thin-walled beam-column elements. Modelling of material nonlinearity for angle members was based on the assumption of lumped plasticity coupled with the concept of a yield surface in force space.

Tower strength improvement was then investigated by adding a series of diaphragm bracing types at mid-height of the slender diagonal members. Analytical studies showed that considerable strength improvements could be achieved using diaphragm bracings. They also showed the effects of different types of bracings, including those of joining the internal nodes of diaphragm members and the location of diaphragms. Experimental studies were undertaken using a tower sub-structure assembly that was strengthened with a variety of diaphragm bracings under two types of loading. The results confirmed the analytical predictions and allowed recommendations on the most efficient diaphragm bracing types. An upgrade scheme that used the most efficient diaphragm bracing type was successfully implemented on existing towers. This scheme used less steel than the replacement of the existing diagonal bracings, was easier to implement in practice, and led to improved tower performance.